408 hyd roller, too much spring pressure?

Aussie Charger said
You had a bad experience with beehives. Fine. Englert Racing ran Comp beehives on a 2.3 Ford to 9200rpm without issue: Ford Lima 2300 cam help please - Don Terrill’s Speed-Talk

On the subject of beehive vs conical rpm, there appear to be a few people out there getting decent rpm on beehives (see below).

I know you told me to do my research, but have you?

That's the trouble with talking in absolutes ("99.999% this, 8K that" etc) – you will always find an example that does not conform to your own experiences or opinion. Just sayin'

10K rpm on beehives here: How high can you REV on these Beehive valve springs? (9K+ fine?) - EvolutionM - Mitsubishi Lancer and Lancer Evolution Community

9K here: Beehive valve springs: benefits?

8-9K here: Single valve springs upgrade and rev limit

8+K here: Beehive spring performance ? - Don Terrill’s Speed-Talk

DANG, comment from one of those threads...
look what a single change to the components did.

"We were experiencing valve float at 6500 rpm with 11/32 valve, 1.94/1.54 with CC beehive set up at 160#/394#, titanium retainers, Smith Brother's push rods, Harland Sharp roller rocker arms, tool steel lifters. Went to 5/16" valves, and increased rpm to 7100, but still nose dives. Going to dual springs next to see where the problem is. Joe-JDC"